The closure of the Strait of Hormuz since late February has blocked approximately 50 percent of worldwide urea exports, creating a critical fertilizer shortage that is hitting U.S. farmers at the worst possible time — the spring planting season when nitrogen fertilizer applications are heaviest. The Fertilizer Institute projects U.S. farmers will face a shortage of approximately 2 million tons of urea this spring, an amount that cannot be fully compensated by alternative sources in the available timeframe. Urea prices have surged nearly 30 percent since Iran halted shipping through the strait. NPR reported the shortage in depth under the headline "War with Iran disrupts fertilizer exports as U.S. farmers prepare for planting season."

The United States imports approximately 18 percent of the nitrogen fertilizer sold domestically, with a significant portion transiting through Gulf shipping lanes. The timing is particularly damaging because, as farmer Matt Ubel told NPR: "Right now, we're kind of... we'll be in the thick of it. Lot of nitrogen gets put on in the spring." Josh Linville of StoneX brokerage captured the agricultural community's alarm: "If you had sat us down before and said, 'Hey, I want you to think of the nightmare scenario for fertilizer... It would be this exact event during this exact time of year.'" The combination of a mid-war spring planting season and the world's primary urea export corridor being shut down is what fertilizer industry analysts had long considered a low-probability catastrophic scenario.

Farmers facing the shortage face an economically painful set of choices. Reducing nitrogen applications will reduce corn yields. Purchasing available fertilizer at elevated prices will compress farm margins that were already thin after years of high input costs. Some producers may shift acreage toward soybeans, which fix atmospheric nitrogen and require less synthetic fertilizer — but that shift, if widespread, would reduce corn production, driving corn prices higher and affecting meat, ethanol, and processed food supply chains that depend on corn as an input. Globally, countries in sub-Saharan Africa and South Asia that depend on Persian Gulf fertilizer suppliers face more severe shortages than U.S. producers, raising international food security concerns that NPR noted in its reporting.

The fertilizer shortage illustrates how the Iran war's economic consequences extend well beyond energy markets into agricultural supply chains that shape food prices for ordinary consumers. Fox Business has covered the broader energy and commodity impact of the Hormuz closure as part of its Iran war economic reporting; the Wall Street Journal's agricultural desk confirmed the fertilizer shortage data and price spike. For rural agricultural communities — which voted overwhelmingly Republican in recent elections — the fertilizer crisis represents a direct economic consequence of the Trump administration's decision to go to war, creating a political tension that conservative media has addressed by emphasizing the urgency of reaching a peace deal that reopens the strait as quickly as possible.